单项选择题

What was special in their recorded sounds

A．A strange, powerful animal sound was heard.
B．A big whale's sound was heard.
C．A sea monster's sound was heard.
D．A giant squid's sound was heard.
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单项选择题
What can be concluded from the passage
A．Scientists' discoveries always change people's belief.
B．There are too many secrets to be discovered.
C．Megalodon may be still alive deep in the ocean.
D．"Deep sound channel" allows sound waves to travel undisturbed.
单项选择题
The woman stealing perfume ________.
A．guessed what the sputniks were for
B．was frightened by its shape
C．could see the camera filming her
D．knew that the detective bad seen her
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